Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8172923 | Apparatus and method for reducing particle contamination in a vacuum chamber An apparatus and method for maintaining low gas velocity variation across a diffuser membrane during the vent-up of a vacuum chamber is disclosed. The diffuser membrane permeability and the pressure conditions across the membrane are chosen to minimize variation in ... | 05/08/2012 |
| 8163064 | Leak-proof membrane element and method of manufacturing such an element A leak-proof membrane element (1) for the selective separation or cleaning of gas, wherein a metal foil (membrane) (3) is deposited onto a supporting stock (substrate) (2, 20) having connection means (4, 21, 34) on the ends/edges of the s... | 04/24/2012 |
| 8142546 | Artificial lung An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other throu... | 03/27/2012 |
| 8137642 | Method and apparatus for calibrating filters during specimen collection A bubble point of a combination of a filter and a liquid is calibrated by applying an initial back pressure through the filter toward the liquid; taking a first plurality of measurements of the level of the liquid in the container; calculating a first variance of th... | 03/20/2012 |
| 8118910 | Layered filtration membrane and methods of making same A layered filter membrane with improved anti-clogging characteristics is provided. In one embodiment, a filter membrane includes multiple polymer layers, each with different pore diameters formed by stretching the polymer layers. Furthermore, the multiple filter lay... | 02/21/2012 |
| 8114192 | Gas separation processes using membrane with permeate sweep to recover reaction feedstocks A gas separation process for treating off-gas streams from reaction processes, and reaction processes including such gas separation. The invention involves flowing the off-gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the pe... | 02/14/2012 |
| 8101009 | Separation membrane by controlled annealing of polyimide polymers This abstract discusses membranes needed to separate fluids for the production of oxygen-enriched air, nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons, and the separation of hydrogen from various petrochemical and oil refining streams. ... | 01/24/2012 |
| 8101010 | Gas separation module A porous structure sealed at both ends for use in a gas separation module; and a method for separating components of a gas stream. ... | 01/24/2012 |
| 8083833 | Flexible template-directed microporous partially pyrolyzed polymeric membranes This invention describes a new concept of flexible template-directed microporous partially pyrolyzed polymeric membranes which have greatly improved performance in separation of gas pairs compared to their precursor polymeric membranes. Organic hosts, such as crown ... | 12/27/2011 |
| 8066799 | Method of making a crosslinked fiber membrane from a high molecular weight, monoesterified polyimide polymer The present disclosure relates to a high molecular weight, monoesterified polyimide polymer. Such high molecular weight, monoesterified polyimide polymers are useful in forming crosslinked polymer membranes for the separation of fluid mixtures. According to its broa... | 11/29/2011 |
| 8057574 | Membrane post treatment The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both.... | 11/15/2011 |
| 8048198 | High performance mixed matrix membranes incorporating at least two kinds of molecular sieves The present invention discloses a new type of high performance mixed matrix membranes (MMMs) and methods for making and using the same. The MMMs comprise a continuous polymer matrix and at least two types of molecular sieves dispersed therein. The continuous polymer... | 11/01/2011 |
| 8034160 | Non-cryogenic nitrogen generators and methods of use This invention relates to gas generators and methods for their use. In some embodiments, the invention relates to devices and methods of generating a gas enriched in a specific component. In other embodiments, the devices are configured to pressurize and regulate th... | 10/11/2011 |
| 8029599 | Separating gas using immobilized buffers A layered structure can be formed having immobilized or segregated pH buffering groups that can be used to separate carbon dioxide or other gases. The pH buffering groups can be immobilized within a matrix, confined within a gel, or segregated by a semi-permeable me... | 10/04/2011 |
| 8002873 | Mobile nitrogen generation system A method of increasing the nitrogen concentration within a tire of a vehicle includes transporting a mobile nitrogen concentrating apparatus to a position adjacent the vehicle and concentrating a nitrogen content of a compressed first gas to obtain a second gas. The... | 08/23/2011 |
| 7998246 | Gas separations using high performance mixed matrix membranes The present invention discloses a novel method of making high performance mixed matrix membranes (MMMs) using stabilized concentrated suspensions of solvents, uniformly dispersed polymer stabilized molecular sieves, and at least two different types of polymers as th... | 08/16/2011 |
| 7985279 | Gas separator and operating method for the same A gas separator having excellent humidifying performance, pressure loss, volume efficiency, and durability humidifies gases used in an on-vehicle fuel cell. The gas separator has upper and lower surfaces of pleat elements of a pleat molding covered by a plate having... | 07/26/2011 |
| 7972415 | Membrane-based compressed air breathing system A breathing air purification device and method having a carbon-monoxide free sweep stream. Water vapor is removed from a compressed air stream using a membrane dryer, comprising, a membrane having a permeate portion and a non-permeate portion, a membrane housing whi... | 07/05/2011 |
| 7964019 | Gas separation membrane A membrane for gas separation includes a porous support layer and a separation layer. The separation layer comprises a mixture of one or more saccharide derivatives and one or more homopolymers. The saccharide derivative(s) may have a cyclic structure with five or s... | 06/21/2011 |
| 7938884 | Integral sweep controller for gas membrane separation device A method and apparatus are provided for controlling the amount of purging that occurs within a membrane separation device. The membrane separation device includes a membrane separation component and sweep controlling component. Within the membrane separation compone... | 05/10/2011 |
| 7918921 | Gas separation membrane module assembly with residue manifold A gas-separation membrane module assembly and a gas-separation process using the assembly. The assembly includes a set of tubes, each containing gas-separation membrane elements, arranged within a housing. The housing contains tube sheets that divide the space withi... | 04/05/2011 |
| 7892321 | Integrated heated prevaporation module An integrated heating system for adding heat to a feed fuel within a module by way of an integrated heating element within the body or casing of the module. The heat may be selectively added to maintain a selected temperature. ... | 02/22/2011 |
| 7871456 | Membranes with controlled permeability to polar and apolar molecules in solution and methods of making same A membrane for use in an implantable glucose sensor including at least one crosslinked substantially hydrophobic polymer and at least one crosslinked substantially hydrophilic polymer; wherein the first and second polymers are different polymers and substantially fo... | 01/18/2011 |
| 7867319 | Filled epoxy tubesheet A filled epoxy tubesheet comprises an epoxy filled with a metal, such as aluminum flakes. Embodiments of the filled epoxy tubesheets can bend due to stress on the surface rather than crack. Embodiments of the filled epoxy tubesheet can be used to improve Air Separat... | 01/11/2011 |
| 7854788 | Filter membrane A filter membrane includes a substrate, a polymer layer provided on the substrate and a plurality of filter openings each having a width of from about 2 nanometers to about 5 nanometers provided in the polymer layer. A method of controlling pore size of a filter mem... | 12/21/2010 |
| 7846238 | Method of manufacturing porous polytetrafluoroethylene membrane, filter medium, and filter unit Provided is a method of manufacturing a porous polytetrafluoroethylene (PTFE) membrane capable of achieving both a high collection efficiency and a low pressure drop, though it has a larger average pore size and a greater thickness than conventional porous PTFE memb... | 12/07/2010 |
| 7815712 | Method of making high performance mixed matrix membranes using suspensions containing polymers and polymer stabilized molecular sieves The present invention discloses a novel method of making high performance mixed matrix membranes (MMMs) using stabilized concentrated suspensions of solvents, uniformly dispersed polymer stabilized molecular sieves, and at least two different types of polymers as th... | 10/19/2010 |
| 7815711 | Method for separating gases from a gas mixture and device for applying such a method Improved method for separating gases from a gas mixture, whereby the gas mixture to be treated is led through a membrane separator (3) by means of a compressor installation (2) and whereby the compressed gas mixture to be treated is cooled in the compr... | 10/19/2010 |
| 7806962 | Cross-linkable and cross-linked mixed matrix membranes and methods of making the same The present invention is for novel high performance cross-linkable and cross-linked mixed matrix membranes and the use of such membranes for separations such as for CO2/CH4, H2/CH4 and propylene/propane separations. More s... | 10/05/2010 |
| 7794523 | Method for the recovery and re-use of process gases The present invention relates to methods and systems for processing an exhaust stream containing a recyclable component mixed with other components and impurities to produce a high purity product that contains all of the recyclable component. One or more waste strea... | 09/14/2010 |
| 7776137 | Polyimide based mixed matrix composite membranes A polyimide MMC membrane useful for the production of oxygen-enriched air or nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons or nitrogen, and the separation of helium or hydrogen from various streams. Membranes of polyimide polymers, su... | 08/17/2010 |
| 7758670 | Four-port gas separation membrane module assembly A gas-separation membrane assembly, and a gas-separation process using the assembly. The assembly incorporates multiple gas-separation membranes in an array within a single vessel or housing, and is equipped with two permeate ports, enabling permeate gas to be withd... | 07/20/2010 |
| 7722701 | Method and system for handling gas diffusion through the envelopes of airships and balloons The subject of the invention is method and envelope structure for handling gas diffusion of airships and other balloons to significantly decrease, respectively fully eliminate envelope diffusion of gases through envelopes of airships and other balloons. During the m... | 05/25/2010 |
| 7662212 | Membrane post treatment The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both.... | 02/16/2010 |
| 7658784 | Composite material, in particular composite membrane, and process for the production of the same Composite materials are provided. A representative material is configured as a composite membrane for gas separation, vapor separation, or pervaporation. The composite membrane comprises at least a first polymer and a second polymer. Processes for the production of ... | 02/09/2010 |
| 7637983 | Metal organic frameworkâpolymer mixed matrix membranes Metal-organic framework (MOF)-polymer mixed matrix membranes (MOF-MMMs) have been prepared by dispersing high surface area MOFs (e.g. IRMOF-1) into a polymer matrix (e.g. Matrimid 5218). The MOFs allow the polymer to infiltrate the pores of the MOFs, which improves ... | 12/29/2009 |
| 7637984 | Integrated separation and purification process Increasing the economic and environmental compatibility in treatment processes in sour gas production. For 25 yr, Mobil Erdgas Erdoel GmbH (MEEG) has been treating considerable amounts of sour gas in N. Germany. In 9 fields with different gas qualities, there are ca... | 12/29/2009 |
| 7625426 | Method for making nano-scale filter A nano-scale filter (10) includes a porous supporting component (14) and a carbon nanotube filtration membrane (12) sintered on a top surface of the porous supporting component. The porous supporting component has a number of micro-scale pores. ... | 12/01/2009 |
| 7604681 | Three-stage membrane gas separation process A process for removing carbon dioxide or nitrogen from gas, especially natural gas. The process uses three membrane separation stages without compression between the second and third stages. ... | 10/20/2009 |
| 7588626 | Composite mixed oxide ionic and electronic conductors for hydrogen separation A mixed ionic and electronic conducting membrane includes a two-phase solid state ceramic composite, wherein the first phase comprises an oxygen ion conductor and the second phase comprises an n-type electronically conductive oxide, wherein the electronically conduc... | 09/15/2009 |
